When did the incident happen?

[27]The incident took place last November in the Iraqi town of Haditha. It was first reported several months later, and a preliminary military investigation in February recommended that a formal criminal investigation be launched. Officials say that probe is still underway. [28] According to the military, 15 Iraqi civilians died in the incident as a result of an explosion caused by an insurgent bomb, which the military calls an IED, or Improvised Explosive Device, that had also killed one of the Marines. Other reports charged that the U.S. Marines on the scene shot the civilians to retaliate for losing their comrade.